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Finding the Fourth Proportional to 109,703.20, 164,619.60 and 80,046.40

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Solution

The fourth proportional to 109,703.20, 164,619.60 and 80,046.40 is: 120,116.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,703.20 : 164,619.60 = 80,046.40 : x
  2. Step 2: Convert to fraction form
    109,703.20/164,619.60 = 80,046.40/x
  3. Step 3: Cross multiply
    109,703.20x = 164,619.60 × 80,046.40
  4. Step 4: Simplify right side
    109,703.20x = 13,177,206,349.44
  5. Step 5: Solve for x
    x = 13,177,206,349.44/109,703.20
  6. Step 6: Final answer
    x = 120,116.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.